Starting Issues

Unknown

Ok I have a friend with a car that starts and runs just fine when it is cold. The choke is wide open even in the cold start up and it makes no difference

in the easy start up and driving..



Trouble comes when the car is turned off.. With the engine warm the car

WILL NOT start unless he squirts starting fluid into the carb..Even then it

cranks slower than normal and takes a bit of time cranking before it fires up.



He is running an ELECTRIC fuel pump on it (ACK) and it delivers a 5 lb stream

of gas to the carb when both hot and cold.. He is running a Carter 2 Barrell WDO on it also... He has a NEW starter motor in the car...



Thoughts and suggestions??

[Deleted User]

The first thing to check is to make sure your generator is charging full amps and volts. At 1800 RPM you should be at 30 amps and 6.7 to 7.2 volts After you check this let me know the answer. This is the main cause for hard starting. Walt.

Park_W

I agree with Walt ... the slow cranking suggests either a weak battery, power loss in the cables and connections, or a weak starter. If it's weak battery or poor connections, especially between the battery and starter solenoid, that means low voltage to the ignition. If there's fuel in the carburetor, these cars should start almost instantly, hot or cold (I'm a little puzzled at your friend's Hornet starting right up when cold if the choke's wide open). Along with checking the generator output, put a voltmeter on the battery posts while it's cranking, and see what voltage is there then. It ought to be at least 5v. Then check the voltage at the starter end of the starter cable when it's cranking. Ought to be at least 4.5v there. If the voltage at the starter is low, and the difference in voltage between battery posts and starter is more than 1/2v, there's excessive loss in the cables, the solenoid, or the connections.

[Deleted User]

In addition to the above don't overlook the voltage regulator.

[Deleted User]

The slow cranking when hot sounds just like my coupe was doing before I got the interstate battery. I got the battery with the highest amount of Cold Cranking Amps I could get. I have had no problem since then. Also it sounds like you may have fuel leaking into the manifold after the engine has been shut off. The fact that the engine starts when cold without the choke being closed, makes me think that it is running way too rich. The electric pump may be overpowering the carb float. (almost flooding the engine)
Bob